The automobile fault code P1620 indicates a problem with the Engine Coolant Switch.

The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light.

The cause of this fault code can be a faulty Engine Coolant Switch, an open or shorted harness, or a poor electrical connection in the Engine Coolant Switch circuit. To fix this issue, you should visually inspect the wiring harness and connectors for any damage.

Look for broken, bent, pushed out, or corroded pins in the connectors. The repair time for this issue is estimated to be around 1.0 hour. It is important to address this problem promptly to prevent further damage to the engine.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p1620 fault code.

  • The symptoms of the automobile fault code p1620 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p1620 can be caused by a faulty engine coolant switch, open or shorted harness, or poor electrical connection in the circuit.

  • The fault code P1620 can be caused by the following: 1.
  • Faulty Engine Coolant Switch.
  • 2.
  • Engine Coolant Switch harness is open or shorted.
  • 3.
  • Engine Coolant Switch circuit has a poor electrical connection.

To fix the p1620 fault code, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p1620, you need to follow these steps: 1.
  • Check the possible causes mentioned above.
  • 2.
  • Visually inspect the wiring harness and connectors related to the fault code.
  • 3.
  • Look for any damaged components.
  • 4.
  • Check for broken, bent, pushed out, or corroded pins in the connectors.
  • The estimated repair time for this fix is 1.0 hour.

The factors influencing the cost of diagnosing and fixing the automobile fault code p1620 based on the estimated repair time of 1.0 hour include the hourly rate charged by auto repair shops, which typically ranges between $75 and $150.

The P1620 fault code indicates a low engine coolant circuit issue.

This means that the Powertrain Control Module (PCM) has detected that the Engine Coolant Switch signal was low for 20 seconds while the engine was running. This low signal indicates an open circuit in the engine coolant system.

When this fault code appears, it is important to address it promptly to prevent any potential damage to the engine.

An open circuit in the engine coolant system can lead to overheating and other serious issues.

By diagnosing and fixing the cause of the low engine coolant circuit, you can ensure the proper functioning of your vehicle’s cooling system and prevent any further complications.

What are the possible causes for the automobile fault code P1620, which triggers the Engine Light or Service Engine Soon Warning Light?

If you see the Engine Light or Service Engine Soon Warning Light illuminated in your car, it could be due to the fault code P1620. This code is often triggered by a faulty Engine Coolant Switch, an open or shorted harness, or a poor electrical connection in the Engine Coolant Switch circuit. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded pins in the connectors. Don’t forget to check the “Possible Causes” mentioned above for a more comprehensive solution.

How can I visually inspect the wiring harness and connectors to fix the P1620 fault code?

If you’re dealing with the P1620 fault code and your engine light is on, it’s time to take action. The culprit could be a faulty engine coolant switch, an open or shorted harness, or a poor electrical connection. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any signs of damage, such as broken or bent pins, corrosion, or components that are out of place. Don’t delay – check these possible causes and get your engine back in top shape.

What should I look for when checking for damaged components and connector’s pins to resolve the P1620 fault code?

When resolving the P1620 fault code, start by checking for damaged components and connector’s pins. This can be done by visually inspecting the related wiring harness and connectors. Look for any signs of damage such as broken, bent, pushed out, or corroded pins. By doing so, you can identify any issues with the Engine Coolant Switch harness and circuit, which may be causing the engine light to turn on. Take the necessary steps to repair or replace any damaged components or pins to resolve the issue.

p1620 error fault code explained

If your engine light is on, it could be due to a faulty engine coolant switch or issues with the switch’s harness or circuit connection. To fix this, visually inspect the wiring harness and connectors for any damage. Also, check for broken, bent, pushed out, or corroded pins on the connectors.

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